I think the reason its controversial is that, with such a law enacted, oppressive governments can keep the revolutionaries in their boxes. Sometimes, you need to know the name of the revolutionaries. For example, with this "memory hole" policy, would we have ever known who these folks were, and what they were fighting for?

https://en.wikipedia.org/wiki/Category:American_revolutionar...

Or is violent revolution simply not ever going to be acceptable any more because the fact of the application of violent force aspect has been usurped by the mentally insane? Are all violent revolutionaries insane, then? (Hint: no, of course not... unless you're the state they're attempting to violently overthrow, in which case you've got your "Diagnostic and Statistical Manual of Mental Disorders, State-Sponsored Edition" at hand, ready for just such a circumstance ..)

(Note: I am not saying we should worship these insane gun-toting school shooters as revolutionaries - but I am saying that we are on a very slippery slope if we're going to whiteout violent revolutionaries from history, future and past. Revolutions don't happen if you don't have a figurehead to get them started.)